{"pageNumber":"1168","pageRowStart":"29175","pageSize":"25","recordCount":40893,"records":[{"id":45064,"text":"wri004251 - 2001 - Simulation of ground-water discharge to Biscayne Bay, southeastern Florida","interactions":[],"lastModifiedDate":"2022-01-04T18:43:24.622742","indexId":"wri004251","displayToPublicDate":"2001-01-01T21:40:00","publicationYear":"2001","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":342,"text":"Water-Resources Investigations Report","code":"WRI","active":false,"publicationSubtype":{"id":5}},"seriesNumber":"2000-4251","displayTitle":"Simulation of Ground-Water Discharge to Biscayne Bay, Southeastern Florida","title":"Simulation of ground-water discharge to Biscayne Bay, southeastern Florida","docAbstract":"As part of the Place-Based Studies Program, the U.S. Geological Survey initiated a project in 1996, in cooperation with the U.S. Army Corps of Engineers, to quantify the rates and patterns of submarine ground-water discharge to Biscayne Bay. Project objectives were achieved through field investigations at three sites (Coconut Grove, Deering Estate, and Mowry Canal) along the coastline of Biscayne Bay and through the development and calibration of variable-density, ground-water flow models. Two-dimensional, vertical cross-sectional models were developed for steady-state conditions for the Coconut Grove and Deering Estate transects to quantify local-scale ground-water discharge patterns to Biscayne Bay. A larger regional-scale model was developed in three dimensions to simulate submarine ground-water discharge to the entire bay. The SEAWAT code, which is a combined version of MODFLOW and MT3D, was used to simulate the complex variable-density flow patterns. Field data suggest that ground-water discharge to Biscayne Bay relative to the shoreline is restricted to within 300 meters at Coconut Grove, 600 to 1,000 meters at Deering Estate, and 100 meters at Mowry Canal. The vertical cross-sectional models, which were calibrated to the field data using the assumption of steady state, tend to focus ground-water discharge to within 50 to 200 meters of the shoreline. With homogeneous distributions for aquifer parameters and a constant-concentration boundary for Biscayne Bay, the numerical models could not reproduce the lower ground-water salinities observed beneath the bay, which suggests that further research may be necessary to improve the accuracy of the numerical simulations. Results from the cross-sectional models, which were able to simulate the approximate position of the saltwater interface, suggest that longitudinal dispersivity ranges between 1 and 10 meters, and transverse dispersivity ranges from 0.1 to 1 meter for the Biscayne aquifer. The three-dimensional, regional-scale model was calibrated to ground-water heads, canal baseflow, and the general position of the saltwater interface for nearly a 10-year period from 1989 to 1998. The mean absolute error between observed and simulated head values is 0.15 meter. The mean absolute error between observed and simulated baseflow is 3 x 105 cubic meters per day. The position of the simulated saltwater interface generally matches the position observed in the field, except for areas north of the Miami Canal where the simulated saltwater interface is located about 5 kilometers inland of the observed saltwater interface. Results from the regional-scale model suggest that the average rate of fresh ground-water discharge to Biscayne Bay for the 10-year period (1989-98) is about 2 x 105 cubic meters per day for 100 kilometers of coastline. This simulated discharge rate is about 6 percent of the measured surface-water discharge to Biscayne Bay for the same period. The model also suggests that nearly 100 percent of the fresh ground-water discharge is to the northern half of Biscayne Bay, north of the Cutler Drain Canal. South of the Cutler Drain Canal, coastal lowlands prevent the water table from rising high enough to drive measurable quantities of ground water to Biscayne Bay. Annual variations in sea-level elevation, which can be as large as 0.3 meter, have a substantial effect on rates of ground-water discharge. During 1989-98, simulated rates of ground-water discharge to Biscayne Bay generally are highest when sea level is relatively low.","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/wri004251","collaboration":"Prepared in cooperation with the U.S. Army Corps of Engineers","usgsCitation":"Langevin, C.D., 2001, Simulation of ground-water discharge to Biscayne Bay, southeastern Florida: U.S. Geological Survey Water-Resources Investigations Report 2000-4251, Report: vi, 127 p.; 3 Plates: 8.5 x 11 in, https://doi.org/10.3133/wri004251.","productDescription":"Report: vi, 127 p.; 3 Plates: 8.5 x 11 in","costCenters":[{"id":27821,"text":"Caribbean-Florida Water Science Center","active":true,"usgs":true}],"links":[{"id":99370,"rank":7,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/wri/2000/4251/wri004251_plate3.pdf","text":"Plate 3","size":"1.06 MB","linkFileType":{"id":1,"text":"pdf"},"description":"Plate 3"},{"id":99369,"rank":6,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/wri/2000/4251/wri004251_plate2.pdf","text":"Plate 2","size":"0.98 MB","linkFileType":{"id":1,"text":"pdf"},"description":"Plate 2"},{"id":167923,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/wri/2000/4251/report-thumb.jpg"},{"id":99367,"rank":2,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/wri/2000/4251/wri004251.pdf","text":"Report","size":"8.79 MB","linkFileType":{"id":1,"text":"pdf"},"description":"Report"},{"id":99368,"rank":3,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/wri/2000/4251/wri004251_plate1.pdf","text":"Plate 1","size":"820 KB","linkFileType":{"id":1,"text":"pdf"},"description":"Plate 1"}],"country":"United States","state":"Florida","otherGeospatial":"Biscayne Bay","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -81.134033203125,\n 25.44823489808649\n ],\n [\n -80.255126953125,\n 25.030861410390447\n ],\n [\n -80.03814697265625,\n 26.125850185680356\n ],\n [\n -80.79620361328125,\n 26.480407161007275\n ],\n [\n -81.134033203125,\n 25.44823489808649\n ]\n ]\n ]\n }\n }\n ]\n}","contact":"

Caribbean-Florida Water Science Center
U.S. Geological Survey
3321 College Avenue
Davie, FL 33314

Contact Pubs Warehouse

","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e49b2e4b07f02db5c9389","contributors":{"authors":[{"text":"Langevin, Christian D. 0000-0001-5610-9759","orcid":"https://orcid.org/0000-0001-5610-9759","contributorId":60297,"corporation":false,"usgs":true,"family":"Langevin","given":"Christian","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":231031,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70073959,"text":"70073959 - 2001 - Carbon balance of the terrestrial biosphere in the twentieth century: analyses of CO2, climate and land use effects with four process-based ecosystem models","interactions":[],"lastModifiedDate":"2014-01-24T15:40:08","indexId":"70073959","displayToPublicDate":"2001-01-01T15:35:00","publicationYear":"2001","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1836,"text":"Global Biogeochemical Cycles","active":true,"publicationSubtype":{"id":10}},"title":"Carbon balance of the terrestrial biosphere in the twentieth century: analyses of CO2, climate and land use effects with four process-based ecosystem models","docAbstract":"The concurrent effects of increasing atmospheric CO2 concentration, climate variability, and cropland establishment and abandonment on terrestrial carbon storage between 1920 and 1992 were assessed using a standard simulation protocol with four process-based terrestrial biosphere models. Over the long-term(1920–1992), the simulations yielded a time history of terrestrial uptake that is consistent (within the uncertainty) with a long-term analysis based on ice core and atmospheric CO2 data. Up to 1958, three of four analyses indicated a net release of carbon from terrestrial ecosystems to the atmosphere caused by cropland establishment. After 1958, all analyses indicate a net uptake of carbon by terrestrial ecosystems, primarily because of the physiological effects of rapidly rising atmospheric CO2. During the 1980s the simulations indicate that terrestrial ecosystems stored between 0.3 and 1.5 Pg C yr−1, which is within the uncertainty of analysis based on CO2 and O2 budgets. Three of the four models indicated (in accordance with O2 evidence) that the tropics were approximately neutral while a net sink existed in ecosystems north of the tropics. Although all of the models agree that the long-term effect of climate on carbon storage has been small relative to the effects of increasing atmospheric CO2 and land use, the models disagree as to whether climate variability and change in the twentieth century has promoted carbon storage or release. Simulated interannual variability from 1958 generally reproduced the El Niño/Southern Oscillation (ENSO)-scale variability in the atmospheric CO2 increase, but there were substantial differences in the magnitude of interannual variability simulated by the models. The analysis of the ability of the models to simulate the changing amplitude of the seasonal cycle of atmospheric CO2 suggested that the observed trend may be a consequence of CO2 effects, climate variability, land use changes, or a combination of these effects. The next steps for improving the process-based simulation of historical terrestrial carbon include (1) the transfer of insight gained from stand-level process studies to improve the sensitivity of simulated carbon storage responses to changes in CO2 and climate, (2) improvements in the data sets used to drive the models so that they incorporate the timing, extent, and types of major disturbances, (3) the enhancement of the models so that they consider major crop types and management schemes, (4) development of data sets that identify the spatial extent of major crop types and management schemes through time, and (5) the consideration of the effects of anthropogenic nitrogen deposition. The evaluation of the performance of the models in the context of a more complete consideration of the factors influencing historical terrestrial carbon dynamics is important for reducing uncertainties in representing the role of terrestrial ecosystems in future projections of the Earth system.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Global Biogeochemical Cycles","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Wiley","doi":"10.1029/2000GB001298","usgsCitation":"McGuire, A., Sitch, S., Clein, J.S., Dargaville, R., Esser, G., Foley, J., Heimann, M., Joos, F., Kaplan, J., Kicklighter, D., Meier, R., Melillo, J.M., Moore, B., Prentice, I.C., Ramankutty, N., Reichenau, T., Schloss, A., Tian, H., Williams, L., and Wittenberg, U., 2001, Carbon balance of the terrestrial biosphere in the twentieth century: analyses of CO2, climate and land use effects with four process-based ecosystem models: Global Biogeochemical Cycles, v. 15, no. 1, p. 183-206, https://doi.org/10.1029/2000GB001298.","productDescription":"24 p.","startPage":"183","endPage":"206","numberOfPages":"24","costCenters":[{"id":108,"text":"Alaska Cooperative Fish and Wildlife Research Unit","active":false,"usgs":true}],"links":[{"id":478829,"rank":0,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://boris.unibe.ch/158812/","text":"External Repository"},{"id":281545,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":281544,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2000GB001298"}],"volume":"15","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53cd502be4b0b290850f32c1","contributors":{"authors":[{"text":"McGuire, A. D.","contributorId":16552,"corporation":false,"usgs":true,"family":"McGuire","given":"A. D.","affiliations":[],"preferred":false,"id":489281,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Sitch, S.","contributorId":81652,"corporation":false,"usgs":true,"family":"Sitch","given":"S.","affiliations":[],"preferred":false,"id":489294,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Clein, Joy S.","contributorId":83697,"corporation":false,"usgs":true,"family":"Clein","given":"Joy","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":489296,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Dargaville, R.","contributorId":101980,"corporation":false,"usgs":true,"family":"Dargaville","given":"R.","affiliations":[],"preferred":false,"id":489298,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Esser, G.","contributorId":15373,"corporation":false,"usgs":true,"family":"Esser","given":"G.","email":"","affiliations":[],"preferred":false,"id":489280,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Foley, J.","contributorId":40760,"corporation":false,"usgs":true,"family":"Foley","given":"J.","affiliations":[],"preferred":false,"id":489284,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Heimann, Martin","contributorId":76497,"corporation":false,"usgs":true,"family":"Heimann","given":"Martin","affiliations":[],"preferred":false,"id":489292,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Joos, F.","contributorId":30786,"corporation":false,"usgs":true,"family":"Joos","given":"F.","email":"","affiliations":[],"preferred":false,"id":489282,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Kaplan, J.","contributorId":82888,"corporation":false,"usgs":true,"family":"Kaplan","given":"J.","email":"","affiliations":[],"preferred":false,"id":489295,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Kicklighter, D. W.","contributorId":31537,"corporation":false,"usgs":false,"family":"Kicklighter","given":"D. W.","affiliations":[{"id":13627,"text":"Woods Hole Oceanographic Institution, Woods Hole, MA","active":true,"usgs":false}],"preferred":false,"id":489283,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Meier, R.A.","contributorId":79267,"corporation":false,"usgs":true,"family":"Meier","given":"R.A.","email":"","affiliations":[],"preferred":false,"id":489293,"contributorType":{"id":1,"text":"Authors"},"rank":11},{"text":"Melillo, J. M.","contributorId":73139,"corporation":false,"usgs":false,"family":"Melillo","given":"J.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":489291,"contributorType":{"id":1,"text":"Authors"},"rank":12},{"text":"Moore, B. III","contributorId":96845,"corporation":false,"usgs":true,"family":"Moore","given":"B.","suffix":"III","email":"","affiliations":[],"preferred":false,"id":489297,"contributorType":{"id":1,"text":"Authors"},"rank":13},{"text":"Prentice, I. C.","contributorId":63969,"corporation":false,"usgs":true,"family":"Prentice","given":"I.","middleInitial":"C.","affiliations":[],"preferred":false,"id":489289,"contributorType":{"id":1,"text":"Authors"},"rank":14},{"text":"Ramankutty, N.","contributorId":57624,"corporation":false,"usgs":false,"family":"Ramankutty","given":"N.","email":"","affiliations":[],"preferred":false,"id":489288,"contributorType":{"id":1,"text":"Authors"},"rank":15},{"text":"Reichenau, T.","contributorId":107064,"corporation":false,"usgs":true,"family":"Reichenau","given":"T.","email":"","affiliations":[],"preferred":false,"id":489299,"contributorType":{"id":1,"text":"Authors"},"rank":16},{"text":"Schloss, A.","contributorId":44320,"corporation":false,"usgs":true,"family":"Schloss","given":"A.","affiliations":[],"preferred":false,"id":489287,"contributorType":{"id":1,"text":"Authors"},"rank":17},{"text":"Tian, H.","contributorId":43524,"corporation":false,"usgs":true,"family":"Tian","given":"H.","affiliations":[],"preferred":false,"id":489286,"contributorType":{"id":1,"text":"Authors"},"rank":18},{"text":"Williams, L.J.","contributorId":41183,"corporation":false,"usgs":true,"family":"Williams","given":"L.J.","email":"","affiliations":[],"preferred":false,"id":489285,"contributorType":{"id":1,"text":"Authors"},"rank":19},{"text":"Wittenberg, U.","contributorId":63990,"corporation":false,"usgs":true,"family":"Wittenberg","given":"U.","email":"","affiliations":[],"preferred":false,"id":489290,"contributorType":{"id":1,"text":"Authors"},"rank":20}]}} ,{"id":70201652,"text":"70201652 - 2001 - Utilizing Mars Digital Image Model (MDIM) and Mars Orbiter laser Altimeter (MOLA) data for photogrammetric control","interactions":[],"lastModifiedDate":"2018-12-19T15:05:27","indexId":"70201652","displayToPublicDate":"2001-01-01T15:04:33","publicationYear":"2001","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Utilizing Mars Digital Image Model (MDIM) and Mars Orbiter laser Altimeter (MOLA) data for photogrammetric control","docAbstract":"

The USGS is producing digital elevation models (DEM) and topographic maps of Mars at scales of 1:250,000 to 1:1,000,000. The initial source material will be Viking Orbiter images, with a later transition to Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) when stereo coverage from that source is available for topographic mapping. The digital terrain models and topographic maps produced by this effort will support geologic mapping and geophysical studies. The maps will be based on the horizontal and vertical control from Mars Orbiter Laser Altimeter (MOLA). Currently, the maps are based on planetographic coordinates, but eventually planetocentric coordinates will be used.

","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Planetary Mapping: ISPRS Working Group IV/9 Workshop Proceedings","largerWorkSubtype":{"id":12,"text":"Conference publication"},"conferenceTitle":"Planetary Mapping: ISPRS Working Group IV/9 Workshop","conferenceDate":"2001","language":"English","publisher":"International Society for Photogrammetry and Remote Sensing","usgsCitation":"Rosiek, M.R., Kirk, R.L., Hare, T.M., and Howington-Kraus, E., 2001, Utilizing Mars Digital Image Model (MDIM) and Mars Orbiter laser Altimeter (MOLA) data for photogrammetric control, in Planetary Mapping: ISPRS Working Group IV/9 Workshop Proceedings, 2001, 4 p.","productDescription":"4 p.","costCenters":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"links":[{"id":360575,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":360574,"rank":1,"type":{"id":15,"text":"Index Page"},"url":"https://astrogeology.usgs.gov/search/map/Research/ISPRS/isprs_etm_OCT01_rosiek_moon_topography"}],"otherGeospatial":"Mars","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5c1b66e9e4b0708288c71d56","contributors":{"authors":[{"text":"Rosiek, Mark R. mrosiek@usgs.gov","contributorId":824,"corporation":false,"usgs":true,"family":"Rosiek","given":"Mark","email":"mrosiek@usgs.gov","middleInitial":"R.","affiliations":[],"preferred":true,"id":754716,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Kirk, Randolph L. 0000-0003-0842-9226 rkirk@usgs.gov","orcid":"https://orcid.org/0000-0003-0842-9226","contributorId":2765,"corporation":false,"usgs":true,"family":"Kirk","given":"Randolph","email":"rkirk@usgs.gov","middleInitial":"L.","affiliations":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"preferred":true,"id":754717,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hare, Trent M. 0000-0001-8842-389X thare@usgs.gov","orcid":"https://orcid.org/0000-0001-8842-389X","contributorId":3188,"corporation":false,"usgs":true,"family":"Hare","given":"Trent","email":"thare@usgs.gov","middleInitial":"M.","affiliations":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"preferred":true,"id":754718,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Howington-Kraus, Elpitha 0000-0001-5787-6554 ahowington@usgs.gov","orcid":"https://orcid.org/0000-0001-5787-6554","contributorId":2815,"corporation":false,"usgs":true,"family":"Howington-Kraus","given":"Elpitha","email":"ahowington@usgs.gov","affiliations":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"preferred":true,"id":754719,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70073952,"text":"70073952 - 2001 - Elastic rebound following the Kocaeli earthquake, Turkey, recorded using synthetic aperture radar interferometry","interactions":[],"lastModifiedDate":"2022-12-22T17:29:44.624405","indexId":"70073952","displayToPublicDate":"2001-01-01T15:01:00","publicationYear":"2001","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1796,"text":"Geology","active":true,"publicationSubtype":{"id":10}},"title":"Elastic rebound following the Kocaeli earthquake, Turkey, recorded using synthetic aperture radar interferometry","docAbstract":"A basic model incorporating satellite synthetic aperture radar (SAR) interferometry of the fault rupture zone that formed during the Kocaeli earthquake of August 17, 1999, documents the elastic rebound that resulted from the concomitant elastic strain release along the North Anatolian fault. For pure strike-slip faults, the elastic rebound function derived from SAR interferometry is directly invertible from the distribution of elastic strain on the fault at criticality, just before the critical shear stress was exceeded and the fault ruptured. The Kocaeli earthquake, which was accompanied by as much as ∼5 m of surface displacement, distributed strain ∼110 km around the fault prior to faulting, although most of it was concentrated in a narrower and asymmetric 10-km-wide zone on either side of the fault. The use of SAR interferometry to document the distribution of elastic strain at the critical condition for faulting is clearly a valuable tool, both for scientific investigation and for the effective management of earthquake hazard.","language":"English","publisher":"Geological Society of America","doi":"10.1130/0091-7613(2001)029<0495:ERFTKE>2.0.CO;2","usgsCitation":"Mayer, L., and Lu, Z., 2001, Elastic rebound following the Kocaeli earthquake, Turkey, recorded using synthetic aperture radar interferometry: Geology, v. 29, no. 6, p. 495-498, https://doi.org/10.1130/0091-7613(2001)029<0495:ERFTKE>2.0.CO;2.","productDescription":"4 p.","startPage":"495","endPage":"498","numberOfPages":"4","costCenters":[{"id":222,"text":"Earth Resources Observation and Science (EROS) Center","active":true,"usgs":true}],"links":[{"id":281520,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Turkey","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ 25.66,35.81 ], [ 25.66,42.11 ], [ 44.82,42.11 ], [ 44.82,35.81 ], [ 25.66,35.81 ] ] ] } } ] }","volume":"29","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53cd5743e4b0b290850f7606","contributors":{"authors":[{"text":"Mayer, Larry","contributorId":77936,"corporation":false,"usgs":true,"family":"Mayer","given":"Larry","affiliations":[],"preferred":false,"id":489271,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Lu, Zhong 0000-0001-9181-1818 lu@usgs.gov","orcid":"https://orcid.org/0000-0001-9181-1818","contributorId":901,"corporation":false,"usgs":true,"family":"Lu","given":"Zhong","email":"lu@usgs.gov","affiliations":[],"preferred":true,"id":489270,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70073949,"text":"70073949 - 2001 - Common features and peculiarities of the seismic activity at Phlegraean Fields, Long Valley, and Vesuvius","interactions":[],"lastModifiedDate":"2014-01-24T14:57:47","indexId":"70073949","displayToPublicDate":"2001-01-01T14:40:00","publicationYear":"2001","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1135,"text":"Bulletin of the Seismological Society of America","onlineIssn":"1943-3573","printIssn":"0037-1106","active":true,"publicationSubtype":{"id":10}},"title":"Common features and peculiarities of the seismic activity at Phlegraean Fields, Long Valley, and Vesuvius","docAbstract":"We analyzed and compared the seismic activity that has occurred in the last two to three decades in three distinct volcanic areas: Phlegraean Fields, Italy; Vesuvius, Italy; and Long Valley, California. Our main goal is to identify and discuss common features and peculiarities in the temporal evolution of earthquake sequences that may reflect similarities and differences in the generating processes between these volcanic systems. In particular, we tried to characterize the time series of the number of events and of the seismic energy release in terms of stochastic, deterministic, and chaotic components. The time sequences from each area consist of thousands of earthquakes that allow a detailed quantitative analysis and comparison. The results obtained showed no evidence for either deterministic or chaotic components in the earthquake sequences in Long Valley caldera, which appears to be dominated by stochastic behavior. In contrast, earthquake sequences at Phlegrean Fields and Mount Vesuvius show a deterministic signal mainly consisting of a 24-hour periodicity. Our analysis suggests that the modulation in seismicity is in some way related to thermal diurnal processes, rather than luni-solar tidal effects. Independently from the process that generates these periodicities on the seismicity., it is suggested that the lack (or presence) of diurnal cycles is seismic swarms of volcanic areas could be closely linked to the presence (or lack) of magma motion.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Bulletin of the Seismological Society of America","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Seismological Society of America","doi":"10.1785/0120000045","usgsCitation":"Marzocchi, W., Vilardo, G., Hill, D., Ricciardi, G., and Ricco, C., 2001, Common features and peculiarities of the seismic activity at Phlegraean Fields, Long Valley, and Vesuvius: Bulletin of the Seismological Society of America, v. 91, no. 2, p. 191-205, https://doi.org/10.1785/0120000045.","productDescription":"15 p.","startPage":"191","endPage":"205","numberOfPages":"15","costCenters":[],"links":[{"id":281518,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":281514,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1785/0120000045"}],"country":"Italy;United States","state":"California","city":"Long Valley;Phlegraean Fields;Vesuvius","volume":"91","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53cd51e4e4b0b290850f430f","contributors":{"authors":[{"text":"Marzocchi, W.","contributorId":29156,"corporation":false,"usgs":true,"family":"Marzocchi","given":"W.","affiliations":[],"preferred":false,"id":489267,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Vilardo, G.","contributorId":94969,"corporation":false,"usgs":true,"family":"Vilardo","given":"G.","email":"","affiliations":[],"preferred":false,"id":489269,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hill, D.P.","contributorId":27432,"corporation":false,"usgs":true,"family":"Hill","given":"D.P.","email":"","affiliations":[],"preferred":false,"id":489266,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Ricciardi, G.P.","contributorId":50817,"corporation":false,"usgs":true,"family":"Ricciardi","given":"G.P.","email":"","affiliations":[],"preferred":false,"id":489268,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Ricco, C.","contributorId":24683,"corporation":false,"usgs":true,"family":"Ricco","given":"C.","affiliations":[],"preferred":false,"id":489265,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70074766,"text":"70074766 - 2001 - Statistical analysis of sand and gravel aggregate deposits of late Pleistocene Lake Bonneville, Utah","interactions":[],"lastModifiedDate":"2014-02-03T14:48:52","indexId":"70074766","displayToPublicDate":"2001-01-01T14:27:00","publicationYear":"2001","noYear":false,"publicationType":{"id":4,"text":"Book"},"publicationSubtype":{"id":12,"text":"Conference publication"},"title":"Statistical analysis of sand and gravel aggregate deposits of late Pleistocene Lake Bonneville, Utah","docAbstract":"Sedimentary deposits of pluvial Lake Bonneville are an important source of sand and gravel suitable for aggregate and construction in Utah. Data on Lake Bonneville basin sand and gravel deposit thickness, volume, grain size, percent of fines, and durability were statistically analyzed to detect variations associated with geologic domains, geographic location, Lake Bonneville shorelines, and sand and gravel deposit type, and to construct quantitative deposit models. Analysis showed several trends; (1) sand and gravel in younger shorelines was slightly more durable and the deposits considerably larger in volume, (2) younger shorelines are also more likely to contain more than one genetic deposit type, (3) the volume of terrace deposits is larger than beach deposits, (4) terraces and beaches are generally thicker than spits and bars, (5) the northern part of the Bonneville Basin contains slightly more durable sand and gravel than the southern part of the basin and is more likely to contain deposits composed of more than one genetic deposit type, and (6) the Wasatch domain deposits are composed of more than one genetic deposit type more often than deposits of the Basin and Range domain. Three additional conclusions with immediate economic significance are; (1) the median sand and gravel deposit in the Wasatch domain, 360,000 m3 (275,000 yd3), is three times larger than that of the Basin and Range domain (120,000 m3 [90,000 yd3]), (2) the median deposit thickness in the Wasatch domain, 5.8 m (19.0 ft), is nearly twice that of the Basin and Range domain (3 m [10 ft]), and (3) the Wasatch domain also contains slightly larger diameter gravel. These three conclusions are significant because the trend for sand and gravel development in the Bonneville Basin is to move from the Wasatch domain to the Basin and Range domain. Smaller, thinner deposits with smaller diameter gravel will require more surface area to mine than would have been necessary in the Wasatch domain. The result is a higher cost for sand and gravel in construction projects in the Salt Lake City area, especially since the gravel must also be hauled further.","largerWorkTitle":"Proceedings of the 35th Forum on the Geology of Industrial Minerals: the Intermountain West Forum 1999","conferenceTitle":"35th Forum on the Geology of Industrial Minerals: the Intermountain West Forum 1999","conferenceDate":"1999-05-02T00:00:00","conferenceLocation":"Salt Lake City, UT","language":"English","publisher":"Utah Geological Survey","isbn":"1-55791-654-3","usgsCitation":"Bliss, J.D., and Bolm, K.S., 2001, Statistical analysis of sand and gravel aggregate deposits of late Pleistocene Lake Bonneville, Utah, p. 195-214.","productDescription":"p. 195-214","numberOfPages":"20","costCenters":[],"links":[{"id":281917,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Idaho;Nevada;Utah","otherGeospatial":"Lake Bonneville","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -115.5691,36.9979 ], [ -115.5691,43.1183 ], [ -109.0411,43.1183 ], [ -109.0411,36.9979 ], [ -115.5691,36.9979 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53cd73fce4b0b2908510942f","contributors":{"authors":[{"text":"Bliss, James D. jbliss@usgs.gov","contributorId":2790,"corporation":false,"usgs":true,"family":"Bliss","given":"James","email":"jbliss@usgs.gov","middleInitial":"D.","affiliations":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"preferred":true,"id":489845,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bolm, K. S.","contributorId":97079,"corporation":false,"usgs":true,"family":"Bolm","given":"K.","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":489846,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70073530,"text":"70073530 - 2001 - Evolution of the conceptual model of unsaturated zone hydrology at Yucca Mountain, Nevada","interactions":[],"lastModifiedDate":"2014-01-17T14:06:21","indexId":"70073530","displayToPublicDate":"2001-01-01T14:02:00","publicationYear":"2001","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2342,"text":"Journal of Hydrology","active":true,"publicationSubtype":{"id":10}},"title":"Evolution of the conceptual model of unsaturated zone hydrology at Yucca Mountain, Nevada","docAbstract":"Yucca Mountain is an arid site proposed for consideration as the United States’ first underground high-level radioactive waste repository. Low rainfall (approximately 170 mm/yr) and a thick unsaturated zone (500–1000 m) are important physical attributes of the site because the quantity of water likely to reach the waste and the paths and rates of movement of the water to the saturated zone under future climates would be major factors in controlling the concentrations and times of arrival of radionuclides at the surrounding accessible environment. The framework for understanding the hydrologic processes that occur at this site and that control how quickly water will penetrate through the unsaturated zone to the water table has evolved during the past 15 yr. Early conceptual models assumed that very small volumes of water infiltrated into the bedrock (0.5–4.5 mm/yr, or 2–3 percent of rainfall), that much of the infiltrated water flowed laterally within the upper nonwelded units because of capillary barrier effects, and that the remaining water flowed down faults with a small amount flowing through the matrix of the lower welded, fractured rocks. It was believed that the matrix had to be saturated for fractures to flow. However, accumulating evidence indicated that infiltration rates were higher than initially estimated, such as infiltration modeling based on neutron borehole data, bomb-pulse isotopes deep in the mountain, perched water analyses and thermal analyses. Mechanisms supporting lateral diversion did not apply at these higher fluxes, and the flux calculated in the lower welded unit exceeded the conductivity of the matrix, implying vertical flow of water in the high permeability fractures of the potential repository host rock, and disequilibrium between matrix and fracture water potentials. The development of numerical modeling methods and parameter values evolved concurrently with the conceptual model in order to account for the observed field data, particularly fracture flow deep in the unsaturated zone. This paper presents the history of the evolution of conceptual models of hydrology and numerical models of unsaturated zone flow at Yucca Mountain, Nevada (Flint, A.L., Flint, L.E., Kwicklis, E.M., Bodvarsson, G.S., Fabryka-Martin, J.M., 2001. Hydrology of Yucca Mountain. Reviews of Geophysics in press). This retrospective is the basis for recommendations for optimizing the efficiency with which a viable and robust conceptual model can be developed for a complex site.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Hydrology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Elsevier","doi":"10.1016/S0022-1694(01)00358-4","usgsCitation":"Flint, A.L., Flint, L.E., Bodvarsson, G.S., Kwicklis, E.M., and Fabryka-Martin, J., 2001, Evolution of the conceptual model of unsaturated zone hydrology at Yucca Mountain, Nevada: Journal of Hydrology, v. 247, no. 1-2, p. 1-30, https://doi.org/10.1016/S0022-1694(01)00358-4.","productDescription":"30 p.","startPage":"1","endPage":"30","numberOfPages":"30","costCenters":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true}],"links":[{"id":281253,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":281252,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/S0022-1694(01)00358-4"}],"country":"United States","state":"Nevada","otherGeospatial":"Yucca Mountain","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -117.2379,35.4976 ], [ -117.2379,37.501 ], [ -115.4938,37.501 ], [ -115.4938,35.4976 ], [ -117.2379,35.4976 ] ] ] } } ] }","volume":"247","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53cd58abe4b0b290850f83e4","contributors":{"authors":[{"text":"Flint, Alan L. 0000-0002-5118-751X aflint@usgs.gov","orcid":"https://orcid.org/0000-0002-5118-751X","contributorId":1492,"corporation":false,"usgs":true,"family":"Flint","given":"Alan","email":"aflint@usgs.gov","middleInitial":"L.","affiliations":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true},{"id":657,"text":"Western Geographic Science Center","active":true,"usgs":true}],"preferred":true,"id":488897,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Flint, Lorraine E. 0000-0002-7868-441X lflint@usgs.gov","orcid":"https://orcid.org/0000-0002-7868-441X","contributorId":1184,"corporation":false,"usgs":true,"family":"Flint","given":"Lorraine","email":"lflint@usgs.gov","middleInitial":"E.","affiliations":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true}],"preferred":true,"id":488896,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Bodvarsson, Gudmundur S.","contributorId":36851,"corporation":false,"usgs":true,"family":"Bodvarsson","given":"Gudmundur","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":488900,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Kwicklis, Edward M.","contributorId":25970,"corporation":false,"usgs":true,"family":"Kwicklis","given":"Edward","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":488899,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Fabryka-Martin, June","contributorId":6760,"corporation":false,"usgs":true,"family":"Fabryka-Martin","given":"June","email":"","affiliations":[],"preferred":false,"id":488898,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70074107,"text":"70074107 - 2001 - Applications of resistivity modeling in reservoir development: examples from Balder Field, Norwegian North Sea","interactions":[],"lastModifiedDate":"2014-01-27T13:58:03","indexId":"70074107","displayToPublicDate":"2001-01-01T13:52:00","publicationYear":"2001","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3044,"text":"Petrophysics","active":true,"publicationSubtype":{"id":10}},"title":"Applications of resistivity modeling in reservoir development: examples from Balder Field, Norwegian North Sea","docAbstract":"The massive Paleocene oil sands of the Balder Field are overlain by several thinly bedded Eocene sand-prone packages of variable facies and reservoir quality. Although these sands have been penetrated by numerous exploration and development wells, uncertainty remains as to their extent, distribution, and ultimate effect on reservoir performance. The section is geologically complex (thin beds, injected sands, shale clasts and laminae, and faulting), and also contains a field-wide primary gas cap. With a depletion plan involving both gas and water injection, geologic/reservoir characterization of the Eocene is critical for prudent resource management during depletion. With this goal, resistivity modeling and core-based thin bed reservoir description from the first phase of development drilling have been integrated with seismic attribute mapping. Detailed core description, core permeability and grain size distribution data delineate six facies and help in distinguishing laterally continuous massive and laminated sands from potentially non-connected injection sands and non-reservoir quality siltstones and tuffs. Volumetric assessment of the thin sand resource has been enhanced by I-D forward modeling of induction log response using a commercial resistivity modeling program, R,BAN. After defining beds and facies with core and high resolution log data, the AHF60 array induction curve response was approximated using the 6FF40 response. Because many of the beds were thinner than 6FF40 resolution, the modeling is considered to provide a lower bound on R,. However, for most beds this model-based R, is significantly higher than that provided by one-foot vertical resolution shallow resistivity data, and is thought to be the best available estimate of true formation resistivity. Sensitivities in STOOIP were assessed with multiple R, earth models which can later be tested against production results. In addition, water saturation height functions, developed in vertical wells and thick beds, can be validated in deviated wells with thin beds. Sand thickness models constrained by this logand core-based petrophysical analysis were used to build impedance seismic synthetic sections from which seismic attributes could be extracted and calibrated. The model-based attribute calibration was then applied to the seismic impedance 3-D cube permitting sand thickness to be mapped and reservoir geology to be modeled with significantly more detail than previously possible. These results will guide the field''s reservoir management and assist in the delineation of new targets.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Petrophysics","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Society of Petrophysicists and Well-Log Analysts","usgsCitation":"Paillet, F.L., Haynes, F., and Buretz, O., 2001, Applications of resistivity modeling in reservoir development: examples from Balder Field, Norwegian North Sea: Petrophysics, v. 42, no. 1, p. 17-18.","productDescription":"2 p.","startPage":"17","endPage":"18","numberOfPages":"2","costCenters":[],"links":[{"id":281585,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"otherGeospatial":"Norwegian Sea;Balder Field","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -13.5,69.95 ], [ -13.5,76.56 ], [ 25.59,76.56 ], [ 25.59,69.95 ], [ -13.5,69.95 ] ] ] } } ] }","volume":"42","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53cd4dace4b0b290850f1a00","contributors":{"authors":[{"text":"Paillet, Frederick L.","contributorId":63820,"corporation":false,"usgs":true,"family":"Paillet","given":"Frederick","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":489410,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Haynes, F.M.","contributorId":19077,"corporation":false,"usgs":true,"family":"Haynes","given":"F.M.","email":"","affiliations":[],"preferred":false,"id":489408,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Buretz, O.M.","contributorId":41739,"corporation":false,"usgs":true,"family":"Buretz","given":"O.M.","email":"","affiliations":[],"preferred":false,"id":489409,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70094748,"text":"70094748 - 2001 - Regional fluid migration in the Illinois basin: Evidence from in situ oxygen isotope analysis of authigenic K-feldspar and quartz from the Mount Simon Sandstone","interactions":[],"lastModifiedDate":"2022-12-22T17:42:25.18327","indexId":"70094748","displayToPublicDate":"2001-01-01T13:27:00","publicationYear":"2001","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1796,"text":"Geology","active":true,"publicationSubtype":{"id":10}},"title":"Regional fluid migration in the Illinois basin: Evidence from in situ oxygen isotope analysis of authigenic K-feldspar and quartz from the Mount Simon Sandstone","docAbstract":"

Oxygen isotope compositions of widespread, authigenic K-feldspar and quartz overgrowths and cements in the Upper Cambrian Mount Simon Sandstone were measured by ion microprobe in 11 samples distributed across the Illinois basin and its periphery. Average K-feldspar δ18O values increase systematically from +14‰ ± 1‰ in the southernmost and deepest samples in Illinois to +24‰ ± 2‰ in the northernmost outcrop sample in Wisconsin. A similar trend was observed for quartz overgrowths (22‰ ± 2‰ to 28‰ ± 2‰). Constant homogenization temperatures (100–130 °C) of fluid inclusions associated with quartz overgrowths throughout the basin suggest that the geographic trend in oxygen isotope compositions is a result of diagenetic modification of a south to north migrating basinal fluid.

","language":"English","publisher":"Geological Society of America","doi":"10.1130/0091-7613(2001)029<1067:RFMITI>2.0.CO;2","usgsCitation":"Chen, Z., Riciputi, L.R., Mora, C.I., and Fishman, N.S., 2001, Regional fluid migration in the Illinois basin: Evidence from in situ oxygen isotope analysis of authigenic K-feldspar and quartz from the Mount Simon Sandstone: Geology, v. 29, no. 12, p. 1067-1070, https://doi.org/10.1130/0091-7613(2001)029<1067:RFMITI>2.0.CO;2.","productDescription":"4 p.","startPage":"1067","endPage":"1070","numberOfPages":"4","costCenters":[],"links":[{"id":282690,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Illinois, Indiana, Kentucky","otherGeospatial":"Illinois Basin","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -90.85,36.43 ], [ -90.85,41.46 ], [ -85.3,41.46 ], [ -85.3,36.43 ], [ -90.85,36.43 ] ] ] } } ] }","volume":"29","issue":"12","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53cd6ff0e4b0b29085106bf1","contributors":{"authors":[{"text":"Chen, Zhensheng","contributorId":52073,"corporation":false,"usgs":true,"family":"Chen","given":"Zhensheng","email":"","affiliations":[],"preferred":false,"id":490853,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Riciputi, Lee R.","contributorId":33616,"corporation":false,"usgs":true,"family":"Riciputi","given":"Lee","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":490852,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Mora, Claudia I.","contributorId":28523,"corporation":false,"usgs":true,"family":"Mora","given":"Claudia","email":"","middleInitial":"I.","affiliations":[],"preferred":false,"id":490851,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Fishman, Neil S.","contributorId":106464,"corporation":false,"usgs":true,"family":"Fishman","given":"Neil","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":490854,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70074097,"text":"70074097 - 2001 - Paleohydrologic record of spring deposits in and around Pleistocene pluvial Lake Tecopa, southeastern California","interactions":[],"lastModifiedDate":"2014-01-27T13:29:19","indexId":"70074097","displayToPublicDate":"2001-01-01T13:21:00","publicationYear":"2001","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1723,"text":"GSA Bulletin","active":true,"publicationSubtype":{"id":10}},"title":"Paleohydrologic record of spring deposits in and around Pleistocene pluvial Lake Tecopa, southeastern California","docAbstract":"Tufa (spring) deposits in the Tecopa basin, California, reflect the response of arid groundwater regimes to wet climate episodes. Two types of tufa are represented, informally defined as (1) an easily disaggregated, fine-grained mixture of calcite and quartz (friable tufa) in the southwest Tecopa Valley, and (2) hard, vuggy micrite, laminated carbonate, and carbonate-cemented sands and gravels (indurated tufa) along the eastern margin of Lake Tecopa. High δ18OVSMOW (Vienna standard mean ocean water) water values, field relations, and the texture of friable tufa suggest rapid nucleation of calcite as subaqueous, fault- controlled groundwater discharge mixed with high-pH, hypersaline lake water. Variations between δ18OVSMOW and δ13CPDB (Peedee belemnite) values relative to other closed basin lakes such as the Great Salt Lake and Lake Lahontan suggest similarities in climatic and hydrologic settings. Indurated tufa, also fault controlled, formed mounds and associated feeder systems as well as stratabound carbonate-cemented ledges. Both deposits represent discharge of deeply circulated, high total dissolved solids, and high pCO2 regional groundwater with kinetic enrichments of as much as several per mil for δ18OVSMOW values.\n\nField relations show that indurated tufa represents episodic discharge, and U-series ages imply that discharge was correlated with cold, wet climate episodes. In response to both the breaching of the Tecopa basin and a modern arid climate, most discharge has changed from fault-controlled locations near basin margins to topographic lows of the Amargosa River drainage at elevations 30–130 m lower. Because of episodic climate change, spring flows may have relocated from basin margin to basin center multiple times.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"GSA Bulletin","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Geological Society of America","doi":"10.1130/0016-7606(2001)113<0659:PROSDI>2.0.CO;2","usgsCitation":"Nelson, S.T., Karlsson, H.R., Paces, J.B., Tingey, D.G., Ward, S., and Peters, M.T., 2001, Paleohydrologic record of spring deposits in and around Pleistocene pluvial Lake Tecopa, southeastern California: GSA Bulletin, v. 113, no. 5, p. 659-670, https://doi.org/10.1130/0016-7606(2001)113<0659:PROSDI>2.0.CO;2.","productDescription":"12 p.","startPage":"659","endPage":"670","numberOfPages":"12","costCenters":[{"id":218,"text":"Denver Federal Center","active":false,"usgs":true}],"links":[{"id":281581,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":281580,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1130/0016-7606(2001)113<0659:PROSDI>2.0.CO;2"}],"country":"United States","state":"California","city":"Tecopa","otherGeospatial":"Lake Tecopa","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -116.286772,35.793291 ], [ -116.286772,35.899551 ], [ -116.10947,35.899551 ], [ -116.10947,35.793291 ], [ -116.286772,35.793291 ] ] ] } } ] }","volume":"113","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53cd6a7ce4b0b290851034a1","contributors":{"authors":[{"text":"Nelson, Stephen T.","contributorId":32078,"corporation":false,"usgs":true,"family":"Nelson","given":"Stephen","email":"","middleInitial":"T.","affiliations":[],"preferred":false,"id":489396,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Karlsson, Haraldur R.","contributorId":80180,"corporation":false,"usgs":true,"family":"Karlsson","given":"Haraldur","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":489399,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Paces, James B. 0000-0002-9809-8493 jbpaces@usgs.gov","orcid":"https://orcid.org/0000-0002-9809-8493","contributorId":2514,"corporation":false,"usgs":true,"family":"Paces","given":"James","email":"jbpaces@usgs.gov","middleInitial":"B.","affiliations":[{"id":318,"text":"Geosciences and Environmental Change Science Center","active":true,"usgs":true}],"preferred":true,"id":489394,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Tingey, David G.","contributorId":67406,"corporation":false,"usgs":true,"family":"Tingey","given":"David","email":"","middleInitial":"G.","affiliations":[],"preferred":false,"id":489398,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Ward, Stephen","contributorId":44072,"corporation":false,"usgs":true,"family":"Ward","given":"Stephen","affiliations":[],"preferred":false,"id":489397,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Peters, Mark T.","contributorId":22243,"corporation":false,"usgs":true,"family":"Peters","given":"Mark","email":"","middleInitial":"T.","affiliations":[],"preferred":false,"id":489395,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}} ,{"id":70159723,"text":"70159723 - 2001 - Field trials of line transect methods applied to estimation of desert tortoise abundance","interactions":[],"lastModifiedDate":"2022-12-22T16:43:34.77679","indexId":"70159723","displayToPublicDate":"2001-01-01T13:15:00","publicationYear":"2001","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2508,"text":"Journal of Wildlife Management","active":true,"publicationSubtype":{"id":10}},"title":"Field trials of line transect methods applied to estimation of desert tortoise abundance","docAbstract":"

We examine the degree to which field observers can meet the assumptions underlying line transect sampling to monitor populations of desert tortoises (Gopherus agassizii). We present the results of 2 field trials using artificial tortoise models in 3 size classes. The trials were conducted on 2 occasions on an area south of Las Vegas, Nevada, where the density of the test population was known. In the first trials, conducted largely by experienced biologists who had been involved in tortoise surveys for many years, the density of adult tortoise models was well estimated (-3.9% bias), while the bias was higher (-20%) for subadult tortoise models. The bias for combined data was -12.0%. The bias was largely attributed to the failure to detect all tortoise models on or near the transect centerline. The second trials were conducted with a group of largely inexperienced student volunteers and used somewhat different searching methods, and the results were similar to the first trials. Estimated combined density of subadult and adult tortoise models had a negative bias (-7.3%), again attributable to failure to detect some models on or near the centerline. Experience in desert tortoise biology, either comparing the first and second trials or in the second trial with 2 experienced biologists versus 16 novices, did not have an apparent effect on the quality of the data or the accuracy of the estimates. Observer training, specific to line transect sampling, and field testing are important components of a reliable survey. Line transect sampling represents a viable method for largescale monitoring of populations of desert tortoise; however, field protocol must be improved to assure the key assumptions are met.

","language":"English","publisher":"Wiley","publisherLocation":"Washington","doi":"10.2307/3803111","usgsCitation":"Anderson, D.R., Burnham, K.P., Lubow, B., Thomas, L.E., Corn, P., Medica, P.A., and Marlow, R., 2001, Field trials of line transect methods applied to estimation of desert tortoise abundance: Journal of Wildlife Management, v. 65, no. 3, p. 583-597, https://doi.org/10.2307/3803111.","productDescription":"15 p.","startPage":"583","endPage":"597","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":481,"text":"Northern Rocky Mountain Science Center","active":true,"usgs":true}],"links":[{"id":311505,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Nevada","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -115.45806884765625,\n 35.66845370835343\n ],\n [\n -115.45806884765625,\n 36.12900165569652\n ],\n [\n -114.88128662109375,\n 36.12900165569652\n ],\n [\n -114.88128662109375,\n 35.66845370835343\n ],\n [\n -115.45806884765625,\n 35.66845370835343\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"65","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"564daf4ce4b0112df6c62e16","contributors":{"authors":[{"text":"Anderson, David R.","contributorId":92722,"corporation":false,"usgs":true,"family":"Anderson","given":"David","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":580195,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Burnham, Kenneth P.","contributorId":95025,"corporation":false,"usgs":true,"family":"Burnham","given":"Kenneth","email":"","middleInitial":"P.","affiliations":[{"id":189,"text":"Colorado Cooperative Fish and Wildlife Research Unit","active":false,"usgs":true}],"preferred":false,"id":580196,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Lubow, Bruce C.","contributorId":131076,"corporation":false,"usgs":false,"family":"Lubow","given":"Bruce C.","affiliations":[{"id":7230,"text":"Natural Resource Ecology Laboratory, Colorado State University","active":true,"usgs":false}],"preferred":false,"id":580197,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Thomas, L. E. N.","contributorId":149967,"corporation":false,"usgs":false,"family":"Thomas","given":"L.","email":"","middleInitial":"E. N.","affiliations":[],"preferred":false,"id":580198,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Corn, Paul Stephen 0000-0002-4106-6335","orcid":"https://orcid.org/0000-0002-4106-6335","contributorId":107379,"corporation":false,"usgs":true,"family":"Corn","given":"Paul Stephen","affiliations":[{"id":595,"text":"U.S. Geological Survey","active":false,"usgs":true}],"preferred":false,"id":580199,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Medica, Philip A.","contributorId":55780,"corporation":false,"usgs":true,"family":"Medica","given":"Philip","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":580200,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Marlow, R.W.","contributorId":20276,"corporation":false,"usgs":true,"family":"Marlow","given":"R.W.","email":"","affiliations":[],"preferred":false,"id":580201,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}} ,{"id":70100286,"text":"70100286 - 2001 - Processes controlling the episodic streamwater transport of atrazine and other agrichemicals in an agricultural watershed","interactions":[],"lastModifiedDate":"2014-03-31T13:07:25","indexId":"70100286","displayToPublicDate":"2001-01-01T13:03:00","publicationYear":"2001","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2342,"text":"Journal of Hydrology","active":true,"publicationSubtype":{"id":10}},"title":"Processes controlling the episodic streamwater transport of atrazine and other agrichemicals in an agricultural watershed","docAbstract":"Episodic streamwater transport of atrazine (a common agricultural herbicide) and nutrients has been observed throughout agricultural watersheds in the United States and poses a serious threat to the quality of its water resources. Catchment-scale atrazine and nutrient transport processes after agricultural application are still poorly understood, and predicting episodic streamwater composition remains an elusive goal. We instrumented a 1.2-km2 agricultural catchment near Harrisonburg, Virginia, and examined streamwater, overland flow, soil water, groundwater, and rainfall during the summer of 1998. Storm chemographs demonstrated different patterns for constituents derived primarily from weathering (silica and calcium), compared to constituents derived primarily from early spring land applications (nitrate, atrazine, DOC, potassium, chloride, and sulfate). During storms, the concentrations of silica and calcium decreased, the atrazine response was variable, and the concentrations of nitrate, DOC, potassium, chloride, and sulfate increased; the elevated nitrate signal lagged several hours behind the other elevated constituents. Graphical and statistical analyses indicated a relatively stable spring-fed baseflow was modified by a mixture of overland flow and soil water. A rapid, short-duration overland-flow pulse dominated the streamflow early in the event and contributed most of the potassium, DOC, chloride, suspended sediment, and atrazine. A longer-duration soil–water pulse dominated the streamflow later in the event and contributed the nitrate as well as additional potassium, DOC, sulfate, and atrazine. The contributions to the episodic streamflow were quantified using a flushing model in which overland-flow and soil–water concentrations decreased exponentially with time during an episode. Flushing time constants for the overland-flow and soil–water reservoirs were calculated on a storm-by-storm basis using separate tracers for each time-variable reservoir. Initial component concentrations were estimated through regression analyses. Mass-balance calculations were used for flow separations and to predict the observed streamwater composition. Model forecasts indicated that reduced fertilizer and pesticide application (rather than elimination of overland-flow or soil–water contributions) was necessary to improve the episodic streamwater composition. This study provides important additional understanding of the catchment-scale processes by which land-applied pesticides and nutrients can move through agricultural systems.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Hydrology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Elsevier","doi":"10.1016/S0022-1694(01)00497-8","usgsCitation":"Hyer, K., Hornberger, G., and Herman, J.S., 2001, Processes controlling the episodic streamwater transport of atrazine and other agrichemicals in an agricultural watershed: Journal of Hydrology, v. 254, no. 1-4, p. 47-66, https://doi.org/10.1016/S0022-1694(01)00497-8.","productDescription":"20 p.","startPage":"47","endPage":"66","numberOfPages":"20","costCenters":[],"links":[{"id":285152,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":285151,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/S0022-1694(01)00497-8"}],"country":"United States","state":"Virginia","otherGeospatial":"Muddy Creek","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -78.8909,38.2642 ], [ -78.8909,38.6171 ], [ -78.2909,38.6171 ], [ -78.2909,38.2642 ], [ -78.8909,38.2642 ] ] ] } } ] }","volume":"254","issue":"1-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5355952de4b0120853e8c167","contributors":{"authors":[{"text":"Hyer, Kenneth kenhyer@usgs.gov","contributorId":2701,"corporation":false,"usgs":true,"family":"Hyer","given":"Kenneth","email":"kenhyer@usgs.gov","affiliations":[{"id":614,"text":"Virginia Water Science Center","active":true,"usgs":true}],"preferred":false,"id":492160,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hornberger, George M.","contributorId":63894,"corporation":false,"usgs":true,"family":"Hornberger","given":"George M.","affiliations":[],"preferred":false,"id":492162,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Herman, Janet S.","contributorId":62138,"corporation":false,"usgs":true,"family":"Herman","given":"Janet","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":492161,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70226929,"text":"70226929 - 2001 - Distributed shear of subglacial till due to Coulomb slip","interactions":[],"lastModifiedDate":"2021-12-21T16:32:18.803613","indexId":"70226929","displayToPublicDate":"2001-01-01T10:25:04","publicationYear":"2001","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2328,"text":"Journal of Glaciology","active":true,"publicationSubtype":{"id":10}},"title":"Distributed shear of subglacial till due to Coulomb slip","docAbstract":"

In most models of the flow of glaciers on till beds, it has been assumed that till behaves as a viscoplastic fluid, despite contradictory evidence from laboratory studies. In accord with this assumption, displacement profiles measured in subglacial till have been fitted with viscoplastic models by estimating the stress distribution. Here we present a model that illustrates how observed displacement profiles can result from till deformation resisted solely by Coulomb friction. Motion in the till bed is assumed to be driven by brief departures from static equilibrium caused by fluctuations in effective normal stress. These fluctuations result from chains of particles that support intergranular forces that are higher than average and that form and fail at various depths in the bed during shearing. Newton’s second law is used to calculate displacements along slip planes and the depth to which deformation extends in the bed. Consequent displacement profiles are convex upward, similar to those measured by Boulton and colleagues at Breidamerkurjökull, Iceland. The model results, when considered together with the long-term and widespread empirical support for Coulomb models in soils engineering, indicate that efforts to fit viscoplastic flow models to till displacement profiles may be misguided.

","language":"English","publisher":"International Glaciological Society","doi":"10.3189/172756501781832115","usgsCitation":"Iverson, N., and Iverson, R.M., 2001, Distributed shear of subglacial till due to Coulomb slip: Journal of Glaciology, v. 47, no. 158, p. 481-488, https://doi.org/10.3189/172756501781832115.","productDescription":"8 p.","startPage":"481","endPage":"488","costCenters":[{"id":157,"text":"Cascades Volcano Observatory","active":false,"usgs":true}],"links":[{"id":478836,"rank":0,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.3189/172756501781832115","text":"Publisher Index Page"},{"id":393198,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"47","issue":"158","noUsgsAuthors":false,"publicationDate":"2017-09-08","publicationStatus":"PW","contributors":{"authors":[{"text":"Iverson, Neal R.","contributorId":91380,"corporation":false,"usgs":true,"family":"Iverson","given":"Neal R.","affiliations":[],"preferred":false,"id":828820,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Iverson, Richard M. 0000-0002-7369-3819 riverson@usgs.gov","orcid":"https://orcid.org/0000-0002-7369-3819","contributorId":536,"corporation":false,"usgs":true,"family":"Iverson","given":"Richard","email":"riverson@usgs.gov","middleInitial":"M.","affiliations":[{"id":615,"text":"Volcano Hazards Program","active":true,"usgs":true},{"id":617,"text":"Volcano Science Center","active":true,"usgs":true}],"preferred":true,"id":828821,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70073332,"text":"70073332 - 2001 - SHRIMP-RG U-Pb zircon geochronology of mesoproterozoic metamorphism and plutonism in the southwesternmost United States","interactions":[],"lastModifiedDate":"2014-01-16T10:10:43","indexId":"70073332","displayToPublicDate":"2001-01-01T10:07:00","publicationYear":"2001","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2309,"text":"Journal of Geology","active":true,"publicationSubtype":{"id":10}},"title":"SHRIMP-RG U-Pb zircon geochronology of mesoproterozoic metamorphism and plutonism in the southwesternmost United States","docAbstract":"Mesoproterozoic intrusive and granulite‐grade metamorphic rocks in southern California have been inferred to be exotic to North America on the basis of perceived chronologic incompatibility with autochthonous cratonal rocks. Ion microprobe geochronology indicates that zircons in granulite‐grade gneisses, dated at 1.4 Ga using conventional methods, are composed of 1.68–1.80‐Ga cores and 1.19‐Ga rims. These Early Proterozoic gneisses were metamorphosed at extremely high temperatures and moderate pressures during emplacement of the 1.19‐Ga San Gabriel anorthosite complex. The lack of a 1.4‐Ga metamorphic event suggests that Proterozoic rocks in this region, rather than being exotic to North America, may in fact be a midcrustal window into Mesoproterozoic crustal evolutionary processes in southwestern North America.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"University of Chicago Press","doi":"10.1086/319975","usgsCitation":"Barth, A.P., Wooden, J., and Coleman, D.S., 2001, SHRIMP-RG U-Pb zircon geochronology of mesoproterozoic metamorphism and plutonism in the southwesternmost United States: Journal of Geology, v. 109, no. 3, p. 319-327, https://doi.org/10.1086/319975.","productDescription":"9 p.","startPage":"319","endPage":"327","numberOfPages":"9","costCenters":[],"links":[{"id":478837,"rank":0,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://doi.org/10.17615/bcdc-8w85","text":"External Repository"},{"id":281153,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":281152,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1086/319975"}],"country":"United States","state":"California","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -118.5,33.5 ], [ -118.5,34.5 ], [ -115.5,34.5 ], [ -115.5,33.5 ], [ -118.5,33.5 ] ] ] } } ] }","volume":"109","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53cd713ee4b0b290851078dd","contributors":{"authors":[{"text":"Barth, Andrew P.","contributorId":94547,"corporation":false,"usgs":true,"family":"Barth","given":"Andrew","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":488590,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wooden, Joseph L.","contributorId":32209,"corporation":false,"usgs":true,"family":"Wooden","given":"Joseph L.","affiliations":[],"preferred":false,"id":488588,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Coleman, Drew S.","contributorId":71442,"corporation":false,"usgs":true,"family":"Coleman","given":"Drew","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":488589,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70234114,"text":"70234114 - 2001 - Integrated surface and borehole strong-motion, soil-response arrays in San Francisco, California","interactions":[],"lastModifiedDate":"2022-08-01T13:50:11.94702","indexId":"70234114","displayToPublicDate":"2001-01-01T09:41:52","publicationYear":"2001","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"title":"Integrated surface and borehole strong-motion, soil-response arrays in San Francisco, California","docAbstract":"

An integrated set of four borehole arrays and ten surface installations is installed in the city of San Francisco, California to measure the response of soft-soil deposits to strong earthquake ground motions. The borehole arrays extend through thick layers of softwater-saturated soils of Holocene age and older more consolidated soils of Pleistocene age into bedrock at depths up to 100 m. The surface installations are configured in pairs to provide simultaneous comparative surface measurements of soft soils and nearby rock. The rock locations also permit comparative measurements of rock as observed at the surface and in nearby boreholes. Complementary structural response arrays alsoare installed near each array.

The arrays are designed to address a wide variety of scientific and engineering issues, and especially the issue of anelastic and nonlinear soil response at high strain levels. Exact anelastic models have been developed to account for contrasts in anelastic properties at boundaries and the resultant inhomogeneity of propagating wave fields. These models predict that significant amounts of energy may be trapped in soil basins with resultant larger amplifications than can be predicted using conventional homogeneous wave-field models with damping. Results of these models are discussed.

","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Strong motion instrumentation for civil engineering structures","largerWorkSubtype":{"id":15,"text":"Monograph"},"language":"English","publisher":"Springer","doi":"10.1007/978-94-010-0696-5_11","usgsCitation":"Borcherdt, R.D., Liu, H.P., Westerlund, R., Dietel, C.M., Gibbs, J.F., and Warrick, R., 2001, Integrated surface and borehole strong-motion, soil-response arrays in San Francisco, California, chap. of Strong motion instrumentation for civil engineering structures, p. 167-178, https://doi.org/10.1007/978-94-010-0696-5_11.","productDescription":"12 p.","startPage":"167","endPage":"178","costCenters":[{"id":234,"text":"Earthquake Hazards Program","active":true,"usgs":true}],"links":[{"id":404560,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","city":"San Francisco","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -123.1787109375,\n 36.901587303978474\n ],\n [\n -121.08032226562499,\n 36.901587303978474\n ],\n [\n -121.08032226562499,\n 38.42777351132902\n ],\n [\n -123.1787109375,\n 38.42777351132902\n ],\n [\n -123.1787109375,\n 36.901587303978474\n ]\n ]\n ]\n }\n }\n ]\n}","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"editors":[{"text":"Erdik, M.","contributorId":55170,"corporation":false,"usgs":true,"family":"Erdik","given":"M.","affiliations":[],"preferred":false,"id":847859,"contributorType":{"id":2,"text":"Editors"},"rank":1},{"text":"Celebi, Mehmet 0000-0002-4769-7357 celebi@usgs.gov","orcid":"https://orcid.org/0000-0002-4769-7357","contributorId":200969,"corporation":false,"usgs":true,"family":"Celebi","given":"Mehmet","email":"celebi@usgs.gov","affiliations":[],"preferred":true,"id":847860,"contributorType":{"id":2,"text":"Editors"},"rank":2},{"text":"Mihailov, V.","contributorId":294370,"corporation":false,"usgs":false,"family":"Mihailov","given":"V.","email":"","affiliations":[],"preferred":false,"id":847861,"contributorType":{"id":2,"text":"Editors"},"rank":3},{"text":"Apaydin, N.","contributorId":294371,"corporation":false,"usgs":false,"family":"Apaydin","given":"N.","email":"","affiliations":[],"preferred":false,"id":847862,"contributorType":{"id":2,"text":"Editors"},"rank":4}],"authors":[{"text":"Borcherdt, Roger D. 0000-0002-8668-0849 borcherdt@usgs.gov","orcid":"https://orcid.org/0000-0002-8668-0849","contributorId":2373,"corporation":false,"usgs":true,"family":"Borcherdt","given":"Roger","email":"borcherdt@usgs.gov","middleInitial":"D.","affiliations":[{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"preferred":true,"id":847853,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Liu, H. P.","contributorId":294369,"corporation":false,"usgs":false,"family":"Liu","given":"H.","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":847854,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Westerlund, R.E.","contributorId":91110,"corporation":false,"usgs":true,"family":"Westerlund","given":"R.E.","affiliations":[],"preferred":false,"id":847855,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Dietel, Christopher M. dietel@usgs.gov","contributorId":4325,"corporation":false,"usgs":true,"family":"Dietel","given":"Christopher","email":"dietel@usgs.gov","middleInitial":"M.","affiliations":[],"preferred":true,"id":847856,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Gibbs, J. F.","contributorId":117091,"corporation":false,"usgs":true,"family":"Gibbs","given":"J.","email":"","middleInitial":"F.","affiliations":[],"preferred":false,"id":847857,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Warrick, R. E.","contributorId":258173,"corporation":false,"usgs":false,"family":"Warrick","given":"R. E.","affiliations":[],"preferred":false,"id":847858,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}} ,{"id":70201974,"text":"70201974 - 2001 - Planetary geodesy and cartography at the USGS, Flagstaff: Moon, Mars, Venus, and beyond","interactions":[],"lastModifiedDate":"2019-02-25T11:07:50","indexId":"70201974","displayToPublicDate":"2001-01-01T09:34:28","publicationYear":"2001","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Planetary geodesy and cartography at the USGS, Flagstaff: Moon, Mars, Venus, and beyond","docAbstract":"

An important theme of our work is the synergistic use of a variety of geodetic, cartographic, and photogrammetric software packages. The USGS digital cartographic software system ISIS provides most of the processing capability needed for planimetric mapping tasks such as our revision of the global digital image mosaic of Mars (MDIM).  The geodetic control network on which this mosaic is based was produced at RAND with planetary bundle-block adjustment software that was developed there and that has recently been transferred to the USGS where we are also using it to compute a revised control network of Io from Voyager and Galileo images.  The revised MDIM compiled in 2000 is substantially improved over the version produced from the same ~4500 Viking Orbiter images in 1991, both in geodetic accuracy and in radiometric/cosmetic quality.  Maps of the Galilean satellites of Jupiter have also been improved geodetically and cosmetically as we have added Galileo images to the control networks and digital mosaics. 

Stereotopographic mapping of the Moon, Mars, Venus, and the asteroid Eros requires ISIS for data ingestion and calibration steps, along with the commercial photogrammetric software SOCET SETâ for “photogrammetric” steps such as adjustment of control and topographic model extraction and editing.  Novel procedures must frequently be developed to deal with problems of planetary datasets such as the need to use large numbers of small images, nonuniform image coverage, poor image overlap, and lack of true ground control.  Some sensors, such as the Magellan Synthetic Aperture Radar (SAR) and Mars Global Surveyor Mars Orbiter Camera (MOC), also require the development of specialized sensor model software.

A second important theme is the complementarity between photogrammetric techniques and the laser altimeter systems coming into increasing use on planetary spacecraft.  Stereoanalysis of Clementine images of the Moon has been used to fill in major gaps in the altimeter dataset at high latitudes, but the stereo data must be tied to the altimetry where the datasets overlap.  For Mars and Eros, our stereomapping provides spatial sampling of topography finer than that achieved by altimetry, but use of the altimetry data for vertical control is essential to improve the absolute accuracy of photogrammetric topographic models.  The dense spatial sampling of the Mars Orbiter Laser Altimeter (MOLA) dataset makes it useful as a source of horizontal control as well:  features in images can easily be recognized in the altimetry and can be assigned coordinates with such small uncertainties that they function effectively as ground control points in the photogrammetric bundle-block adjustment.  Such MOLA-derived ground points will be used to further improve the Viking Orbiter based control network and MDIM late in 2001 and will be incorporated into a subsequent network and mosaic based on global stereo imagery from MOC.

","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Proceedings of the XXth International Cartographic Conference","largerWorkSubtype":{"id":12,"text":"Conference publication"},"conferenceTitle":"XXth International Cartographic Conference","conferenceDate":"August 6-10, 2001","conferenceLocation":"Beijing, China","language":"English","publisher":"International Cartographic Association (ICA)","usgsCitation":"Kirk, R.L., Rosiek, M.R., Howington-Kraus, E., Eliason, E.M., Archinal, B.A., and Lee, E., 2001, Planetary geodesy and cartography at the USGS, Flagstaff: Moon, Mars, Venus, and beyond, in Proceedings of the XXth International Cartographic Conference, Beijing, China, August 6-10, 2001, 8 p.","productDescription":"8 p.","costCenters":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"links":[{"id":360953,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"otherGeospatial":"Eros, Mars, Moon, Venus","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Kirk, Randolph L. 0000-0003-0842-9226 rkirk@usgs.gov","orcid":"https://orcid.org/0000-0003-0842-9226","contributorId":2765,"corporation":false,"usgs":true,"family":"Kirk","given":"Randolph","email":"rkirk@usgs.gov","middleInitial":"L.","affiliations":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"preferred":true,"id":756392,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Rosiek, Mark R. mrosiek@usgs.gov","contributorId":824,"corporation":false,"usgs":true,"family":"Rosiek","given":"Mark","email":"mrosiek@usgs.gov","middleInitial":"R.","affiliations":[],"preferred":true,"id":756393,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Howington-Kraus, Elpitha 0000-0001-5787-6554 ahowington@usgs.gov","orcid":"https://orcid.org/0000-0001-5787-6554","contributorId":2815,"corporation":false,"usgs":true,"family":"Howington-Kraus","given":"Elpitha","email":"ahowington@usgs.gov","affiliations":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"preferred":true,"id":756394,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Eliason, Eric M.","contributorId":21280,"corporation":false,"usgs":true,"family":"Eliason","given":"Eric","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":756395,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Archinal, Brent A. 0000-0002-6654-0742 barchinal@usgs.gov","orcid":"https://orcid.org/0000-0002-6654-0742","contributorId":2816,"corporation":false,"usgs":true,"family":"Archinal","given":"Brent","email":"barchinal@usgs.gov","middleInitial":"A.","affiliations":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"preferred":true,"id":756396,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Lee, Ella M. elee@usgs.gov","contributorId":3557,"corporation":false,"usgs":true,"family":"Lee","given":"Ella M.","email":"elee@usgs.gov","affiliations":[],"preferred":true,"id":756397,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}} ,{"id":2000153,"text":"2000153 - 2001 - New England wildlife: a model for ecosystem management -- ECORESEARCH","interactions":[],"lastModifiedDate":"2012-02-02T00:14:55","indexId":"2000153","displayToPublicDate":"2001-01-01T01:00:00","publicationYear":"2001","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":1,"text":"Federal Government Series"},"seriesTitle":{"id":32,"text":"General Technical Report","active":false,"publicationSubtype":{"id":1}},"seriesNumber":"NE-283","title":"New England wildlife: a model for ecosystem management -- ECORESEARCH","language":"English","publisher":"U.S. Forest Service, Northeastern Research Station","publisherLocation":"Newtown Square, PA","usgsCitation":"Short, H., Hestbeck, J., and DeGraaf, R., 2001, New England wildlife: a model for ecosystem management -- ECORESEARCH: General Technical Report NE-283.","costCenters":[{"id":480,"text":"Northern Prairie Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":198403,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":92004,"rank":100,"type":{"id":15,"text":"Index Page"},"url":"https://www.treesearch.fs.fed.us/pubs/5366","linkFileType":{"id":5,"text":"html"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4affe4b07f02db697a59","contributors":{"authors":[{"text":"Short, H.L.","contributorId":59147,"corporation":false,"usgs":true,"family":"Short","given":"H.L.","email":"","affiliations":[],"preferred":false,"id":325182,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hestbeck, J.B.","contributorId":107802,"corporation":false,"usgs":true,"family":"Hestbeck","given":"J.B.","affiliations":[],"preferred":false,"id":325184,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"DeGraaf, R.M.","contributorId":75116,"corporation":false,"usgs":true,"family":"DeGraaf","given":"R.M.","affiliations":[],"preferred":false,"id":325183,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70023302,"text":"70023302 - 2001 - Influence of reactive sulfide (AVS) and supplementary food on Ag, Cd and Zn bioaccumulation in the marine polychaete Neanthes arenaceodentata","interactions":[],"lastModifiedDate":"2018-12-03T08:55:15","indexId":"70023302","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2663,"text":"Marine Ecology Progress Series","active":true,"publicationSubtype":{"id":10}},"title":"Influence of reactive sulfide (AVS) and supplementary food on Ag, Cd and Zn bioaccumulation in the marine polychaete Neanthes arenaceodentata","docAbstract":"A laboratory bioassay determined the relative contribution of various pathways of Ag, Cd and Zn bioaccumulation in the marine polychaete Neanthes arenaceodentata exposed to moderately contaminated sediments. Juvenile worms were exposed for 25 d to experimental sediments containing 5 different reactive sulfide (acid volatile sulfides, AVS) concentrations (1 to 30 ??mol g-1), but with constant Ag, Cd, and Zn concentrations of 0.1, 0.1 and 7 ??mol g-1, respectively. The sediments were supplemented with contaminated food (TetraMin??) containing 3 levels of Ag-Cd-Zn (uncontaminated, 1?? or 5??1 metal concentrations in the contaminated sediment). The results suggest that bioaccumulation of Ag, Cd and Zn in the worms occurred predominantly from ingestion of contaminated sediments and contaminated supplementary food. AVS or dissolved metals (in porewater and overlying water) had a minor effect on bioaccumulation of the 3 metals in most of the treatments. The contribution to uptake from the dissolved source was most important in the most oxic sediments, with maximum contributions of 8% for Ag, 30% for Cd and 20% for Zn bioaccumulation. Sediment bioassays where uncontaminated supplemental food is added could seriously underestimate metal exposures in an equilibrated system; N. arenaceodentata feeding on uncontaminated food would be exposed to 40-60% less metal than if the food source was equilibrated (as occurs in nature). Overall, the results show that pathways of metal exposure are dynamically linked in contaminated sediments and shift as external geochemical characteristics and internal biological attributes vary.","language":"English","publisher":"Inter-Research","doi":"10.3354/meps216129","issn":"01718630","usgsCitation":"Lee, J., Lee, B., Yoo, H., Koh, C., and Luoma, S., 2001, Influence of reactive sulfide (AVS) and supplementary food on Ag, Cd and Zn bioaccumulation in the marine polychaete Neanthes arenaceodentata: Marine Ecology Progress Series, v. 216, p. 129-140, https://doi.org/10.3354/meps216129.","productDescription":"12 p.","startPage":"129","endPage":"140","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":478950,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.3354/meps216129","text":"Publisher Index Page"},{"id":232519,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"216","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a3b6de4b0c8380cd62513","contributors":{"authors":[{"text":"Lee, J.-S.","contributorId":15787,"corporation":false,"usgs":true,"family":"Lee","given":"J.-S.","email":"","affiliations":[],"preferred":false,"id":397204,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Lee, B.-G.","contributorId":11777,"corporation":false,"usgs":true,"family":"Lee","given":"B.-G.","email":"","affiliations":[],"preferred":false,"id":397203,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Yoo, H.","contributorId":46725,"corporation":false,"usgs":true,"family":"Yoo","given":"H.","email":"","affiliations":[],"preferred":false,"id":397205,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Koh, C.-H.","contributorId":9797,"corporation":false,"usgs":true,"family":"Koh","given":"C.-H.","email":"","affiliations":[],"preferred":false,"id":397202,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Luoma, S. N.","contributorId":86353,"corporation":false,"usgs":true,"family":"Luoma","given":"S. N.","affiliations":[],"preferred":false,"id":397206,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70185082,"text":"70185082 - 2001 - North Pacific decadal climate variability since 1661","interactions":[],"lastModifiedDate":"2022-08-23T16:58:26.463721","indexId":"70185082","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2216,"text":"Journal of Climate","active":true,"publicationSubtype":{"id":10}},"title":"North Pacific decadal climate variability since 1661","docAbstract":"

Climate in the North Pacific and North American sectors has experienced interdecadal shifts during the twentieth century. A network of recently developed tree-ring chronologies for Southern and Baja California extends the instrumental record and reveals decadal-scale variability back to 1661. The Pacific decadal oscillation (PDO) is closely matched by the dominant mode of tree-ring variability that provides a preliminary view of multiannual climate fluctuations spanning the past four centuries. The reconstructed PDO index features a prominent bidecadal oscillation, whose amplitude weakened in the late l700s to mid-1800s. A comparison with proxy records of ENSO suggests that the greatest decadal-scale oscillations in Pacific climate between 1706 and 1977 occurred around 1750, 1905, and 1947.

","language":"English","publisher":"American Meteorological Society","doi":"10.1175/1520-0442(2001)014%3C0005:NPDCVS%3E2.0.CO;2","usgsCitation":"Biondi, F., Gershunov, A., and Cayan, D.R., 2001, North Pacific decadal climate variability since 1661: Journal of Climate, v. 14, no. 1, p. 5-10, https://doi.org/10.1175/1520-0442(2001)014%3C0005:NPDCVS%3E2.0.CO;2.","productDescription":"6 p.","startPage":"5","endPage":"10","costCenters":[],"links":[{"id":337528,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"14","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"58c9012ae4b0849ce97abd1d","contributors":{"authors":[{"text":"Biondi, Franco","contributorId":75849,"corporation":false,"usgs":true,"family":"Biondi","given":"Franco","affiliations":[],"preferred":false,"id":684278,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Gershunov, Alexander","contributorId":45238,"corporation":false,"usgs":true,"family":"Gershunov","given":"Alexander","email":"","affiliations":[],"preferred":false,"id":684279,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Cayan, Daniel R. 0000-0002-2719-6811 drcayan@usgs.gov","orcid":"https://orcid.org/0000-0002-2719-6811","contributorId":1494,"corporation":false,"usgs":true,"family":"Cayan","given":"Daniel","email":"drcayan@usgs.gov","middleInitial":"R.","affiliations":[],"preferred":false,"id":684280,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":1016562,"text":"1016562 - 2001 - Impact of the Conservation Reserve Program on duck recruitment in the U.S. Prairie Pothole Region","interactions":[],"lastModifiedDate":"2018-01-05T10:17:51","indexId":"1016562","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2508,"text":"Journal of Wildlife Management","active":true,"publicationSubtype":{"id":10}},"title":"Impact of the Conservation Reserve Program on duck recruitment in the U.S. Prairie Pothole Region","docAbstract":"The U.S. Department of Agriculture (USDA)'s Conservation Reserve Program (CRP) resulted in the conversion of about 1.9 million ha of cropland to perennial grass cover in the Prairie Pothole Region of North Dakota, South Dakota, and northeastern Montana by 1992. Many wildlife managers believed this cover would provide benefits to wildlife, including upland nesting ducks. During 1992-1995, we evaluated success of 5 duck species nesting in CRP fields and nearby Waterfowl Production Areas (WPA) throughout the region. We examined relationships between daily survival rates (DSR) of duck nests in CRP cover and landscape-level habitat and population parameters. We computed DSR of duck nests in other major cover types in our study area from data collected during 1980-1984 (pre-CRP) and 1990-1994 (CRP) periods. We then applied recruitment models to estimate duck production in our study area during peak CRP years (1992-1997) and compared these results with those that simulated the scenario in which cropland was in place of CRP cover (i.e., the CRP had not occurred). DSR were higher in all habitats combined during the CRP period compared to the pre-CRP period. Regressions of DSR in CRP cover on the percent of each study plot in perennial cover and geographic location were significant (P < 0.01) for 4 of 5 duck (Anas spp.) species. Estimated nest success and recruitment rates for the 5 species combined during 1992-1997 were 46% and 30% higher, respectively, with CRP cover on the landscape compared to a scenario where we simulated cropland in place of CRP. Our model estimated an additional 12.4 million recruits from our study area to the fall flight as a consequence of the CRP during 1992-1997. Our results document benefits to 5 duck species in the northern plains associated with a farm program that provided financial incentives to landowners for planting undisturbed grass cover as an alternative to annual crops.","language":"English","publisher":"Wildlife Society","doi":"10.2307/3803027","usgsCitation":"Reynolds, R.E., Shaffer, T.L., Renner, R.W., Newton, W.E., and Batt, B.D., 2001, Impact of the Conservation Reserve Program on duck recruitment in the U.S. Prairie Pothole Region: Journal of Wildlife Management, v. 65, no. 4, p. 765-780, https://doi.org/10.2307/3803027.","productDescription":"15 p.","startPage":"765","endPage":"780","costCenters":[{"id":480,"text":"Northern Prairie Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":129451,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"65","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a04e4b07f02db5f8621","contributors":{"authors":[{"text":"Reynolds, Ronald E.","contributorId":174572,"corporation":false,"usgs":false,"family":"Reynolds","given":"Ronald","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":324380,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Shaffer, Terry L. 0000-0001-6950-8951 tshaffer@usgs.gov","orcid":"https://orcid.org/0000-0001-6950-8951","contributorId":3192,"corporation":false,"usgs":true,"family":"Shaffer","given":"Terry","email":"tshaffer@usgs.gov","middleInitial":"L.","affiliations":[{"id":480,"text":"Northern Prairie Wildlife Research Center","active":true,"usgs":true}],"preferred":true,"id":324382,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Renner, Randy W.","contributorId":174573,"corporation":false,"usgs":false,"family":"Renner","given":"Randy","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":324381,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Newton, Wesley E. 0000-0002-1377-043X wnewton@usgs.gov","orcid":"https://orcid.org/0000-0002-1377-043X","contributorId":3661,"corporation":false,"usgs":true,"family":"Newton","given":"Wesley","email":"wnewton@usgs.gov","middleInitial":"E.","affiliations":[{"id":480,"text":"Northern Prairie Wildlife Research Center","active":true,"usgs":true}],"preferred":true,"id":324379,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Batt, Bruce D.J.","contributorId":113404,"corporation":false,"usgs":false,"family":"Batt","given":"Bruce","email":"","middleInitial":"D.J.","affiliations":[],"preferred":false,"id":324383,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70022986,"text":"70022986 - 2001 - Predictions of hydrothermal alteration within near-ridge oceanic crust from coordinated geochemical and fluid flow models","interactions":[],"lastModifiedDate":"2018-03-21T15:38:21","indexId":"70022986","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2499,"text":"Journal of Volcanology and Geothermal Research","active":true,"publicationSubtype":{"id":10}},"title":"Predictions of hydrothermal alteration within near-ridge oceanic crust from coordinated geochemical and fluid flow models","docAbstract":"Coordinated geochemical and hydrological calculations guide our understanding of the composition, fluid flow patterns, and thermal structure of near-ridge oceanic crust. The case study presented here illustrates geochemical and thermal changes taking place as oceanic crust ages from 0.2 to 1.0 Myr. Using a finite element code, we model fluid flow and heat transport through the upper few hundred meters of an abyssal hill created at an intermediate spreading rate. We use a reaction path model with a customized database to calculate equilibrium fluid compositions and mineral assemblages of basalt and seawater at 500 bars and temperatures ranging from 150 to 400??C. In one scenario, reaction path calculations suggest that volume increases on the order of 10% may occur within portions of the basaltic basement. If this change in volume occurred, it would be sufficient to fill all primary porosity in some locations, effectively sealing off portions of the oceanic crust. Thermal profiles resulting from fluid flow simulations indicate that volume changes along this possible reaction path occur primarily within the first 0.4 Myr of crustal aging. ?? 2001 Elsevier Science B.V. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Volcanology and Geothermal Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/S0377-0273(01)00215-3","issn":"03770273","usgsCitation":"Wetzel, L., Raffensperger, J.P., and Shock, E., 2001, Predictions of hydrothermal alteration within near-ridge oceanic crust from coordinated geochemical and fluid flow models: Journal of Volcanology and Geothermal Research, v. 110, no. 3-4, p. 319-342, https://doi.org/10.1016/S0377-0273(01)00215-3.","startPage":"319","endPage":"342","numberOfPages":"24","costCenters":[],"links":[{"id":233545,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":208103,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/S0377-0273(01)00215-3"}],"volume":"110","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a81fae4b0c8380cd7b830","contributors":{"authors":[{"text":"Wetzel, L.R.","contributorId":9525,"corporation":false,"usgs":true,"family":"Wetzel","given":"L.R.","email":"","affiliations":[],"preferred":false,"id":395701,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Raffensperger, Jeff P. 0000-0001-9275-6646 jpraffen@usgs.gov","orcid":"https://orcid.org/0000-0001-9275-6646","contributorId":199119,"corporation":false,"usgs":true,"family":"Raffensperger","given":"Jeff","email":"jpraffen@usgs.gov","middleInitial":"P.","affiliations":[{"id":374,"text":"Maryland Water Science Center","active":true,"usgs":true}],"preferred":true,"id":395703,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Shock, E.L.","contributorId":54071,"corporation":false,"usgs":true,"family":"Shock","given":"E.L.","email":"","affiliations":[],"preferred":false,"id":395702,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70023071,"text":"70023071 - 2001 - Streamflow forecasting using the modular modeling system and an object-user interface","interactions":[],"lastModifiedDate":"2012-03-12T17:20:36","indexId":"70023071","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Streamflow forecasting using the modular modeling system and an object-user interface","docAbstract":"The U.S. Geological Survey (USGS), in cooperation with the Bureau of Reclamation (BOR), developed a computer program to provide a general framework needed to couple disparate environmental resource models and to manage the necessary data. The Object-User Interface (OUI) is a map-based interface for models and modeling data. It provides a common interface to run hydrologic models and acquire, browse, organize, and select spatial and temporal data. One application is to assist river managers in utilizing streamflow forecasts generated with the Precipitation-Runoff Modeling System running in the Modular Modeling System (MMS), a distributed-parameter watershed model, and the National Weather Service Extended Streamflow Prediction (ESP) methodology.","largerWorkTitle":"Proceedings of The Western Snow Conference","conferenceTitle":"69th Annual Meeting Western Snow Conference","conferenceDate":"16 April 2001 through 19 April 2001","conferenceLocation":"Sun Valley, ID","language":"English","issn":"01610589","usgsCitation":"Jeton, A., 2001, Streamflow forecasting using the modular modeling system and an object-user interface, in Proceedings of The Western Snow Conference, Sun Valley, ID, 16 April 2001 through 19 April 2001, p. 85-91.","startPage":"85","endPage":"91","numberOfPages":"7","costCenters":[],"links":[{"id":233731,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b9aeee4b08c986b31cbba","contributors":{"authors":[{"text":"Jeton, A.E.","contributorId":61841,"corporation":false,"usgs":true,"family":"Jeton","given":"A.E.","email":"","affiliations":[],"preferred":false,"id":396030,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":1008622,"text":"1008622 - 2001 - New approaches for sampling and modeling native and exotic plant species richness","interactions":[],"lastModifiedDate":"2012-02-02T00:04:27","indexId":"1008622","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3746,"text":"Western North American Naturalist","onlineIssn":"1944-8341","printIssn":"1527-0904","active":true,"publicationSubtype":{"id":10}},"title":"New approaches for sampling and modeling native and exotic plant species richness","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Western North American Naturalist","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","usgsCitation":"Chong, G., Reich, R., Kalkhan, M.A., and Stohlgren, T., 2001, New approaches for sampling and modeling native and exotic plant species richness: Western North American Naturalist, v. 61, p. 328-335.","productDescription":"p. 328-335","startPage":"328","endPage":"335","numberOfPages":"8","costCenters":[{"id":481,"text":"Northern Rocky Mountain Science Center","active":true,"usgs":true}],"links":[{"id":131862,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"61","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4afee4b07f02db6977cd","contributors":{"authors":[{"text":"Chong, G.W.","contributorId":54153,"corporation":false,"usgs":true,"family":"Chong","given":"G.W.","email":"","affiliations":[],"preferred":false,"id":318272,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Reich, R.M.","contributorId":68258,"corporation":false,"usgs":true,"family":"Reich","given":"R.M.","email":"","affiliations":[],"preferred":false,"id":318273,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kalkhan, M. A.","contributorId":82655,"corporation":false,"usgs":false,"family":"Kalkhan","given":"M.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":318274,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Stohlgren, T.J.","contributorId":7217,"corporation":false,"usgs":true,"family":"Stohlgren","given":"T.J.","email":"","affiliations":[],"preferred":false,"id":318271,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":1001023,"text":"1001023 - 2001 - Fish community dynamics in northeastern Lake Ontario with emphasis on the growth and reproductive success of yellow perch (Perca flavescens) and white perch (Morone americana), 1978 to1997","interactions":[],"lastModifiedDate":"2016-05-23T11:50:30","indexId":"1001023","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2330,"text":"Journal of Great Lakes Research","active":true,"publicationSubtype":{"id":10}},"title":"Fish community dynamics in northeastern Lake Ontario with emphasis on the growth and reproductive success of yellow perch (Perca flavescens) and white perch (Morone americana), 1978 to1997","docAbstract":"

Fishes were assessed in Guffin, Chaumount, and Black River bays in northeastern Lake Ontario with a 7.9-m (headrope) bottom trawl during late September and early October, 1978 to 1997. Fish density declined in the early 1990s with sharp declines in abundance of spottail shiner (Notropis hudsonius), trout-perch (Percopsis omiscomaycus), and johnny darter (Etheostoma nigrum) occurring in 1993 to 1995. Rising numbers of piscivores, walleye (Stizostedion vitreum) and double-crested cormorant (Phalacrocorax auritus), increased predation pressure, presumably acting in concert with oligotrophication to lower fish density, particularly after 1991 when large numbers of adult alewife (Alosa pseudoharengus) no longer migrated to the northeast basin in spring. Annual mortality of yellow perch (Perca flavescens) from age 2 to 5 rose from 33% in 1980–83 to 65% in 1992–95 and was positively related to piscivore numbers (P = 0.01, r = 0.96, n = 5). Annual mortality of yellow perch from age 0 to 2 also peaked in 1992–95. Abundance of yellow perch YOY in fall varied 40 fold and was not related to water warming in spring (P = 0.45, r = −0.19, n = 18) but was negatively related to the abundance of adult alewives in spring (P = 0.04, r = −0.49, n = 18). Although yellow perch produced moderate to strong year classes each year during 1991–95, stock size failed to increase because of rapidly accelerating mortality. Fully 85% of the variation in mean length of yellow perch YOY was explained by a multiple regression model which included YOY abundance, mean total phosphorus, and cumulative degree days > 13.5°C (P < 0.01, n = 15). Abundance of white perch (Morone americana) YOY varied nearly 200 fold and was not related to water warming or spring alewife abundance (P > 0.15). Variation in mean length of white perch YOY was related to cumulative degree days > 15°C (P < 0.01, r = 0.69).

","language":"English","publisher":"Elsevier","doi":"10.1016/S0380-1330(01)70652-1","usgsCitation":"O’Gorman, R., and Burnett, J.A., 2001, Fish community dynamics in northeastern Lake Ontario with emphasis on the growth and reproductive success of yellow perch (Perca flavescens) and white perch (Morone americana), 1978 to1997: Journal of Great Lakes Research, v. 27, no. 3, p. 367-383, https://doi.org/10.1016/S0380-1330(01)70652-1.","productDescription":"17 p.","startPage":"367","endPage":"383","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":324,"text":"Great Lakes Science Center","active":true,"usgs":true}],"links":[{"id":133598,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"27","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e49f5e4b07f02db5f0e74","contributors":{"authors":[{"text":"O’Gorman, Robert rogorman@usgs.gov","contributorId":3451,"corporation":false,"usgs":true,"family":"O’Gorman","given":"Robert","email":"rogorman@usgs.gov","affiliations":[],"preferred":true,"id":310245,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Burnett, John A.D.","contributorId":54955,"corporation":false,"usgs":true,"family":"Burnett","given":"John","email":"","middleInitial":"A.D.","affiliations":[],"preferred":false,"id":310246,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":96214,"text":"96214 - 2001 - Habitat measurement and modeling in the Green and Yampa Rivers: Project Report to Natural Resource Preservation Program December 2001","interactions":[],"lastModifiedDate":"2017-12-18T09:56:11","indexId":"96214","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":9,"text":"Other Report"},"title":"Habitat measurement and modeling in the Green and Yampa Rivers: Project Report to Natural Resource Preservation Program December 2001","docAbstract":"

Populations of the endangered razorback sucker (Xyrauchen texanus) in the middle Green River have declined since closer of Flaming Gorge Dam in 1962. The apparent cause for the decline is a lack of successful recruitment. Recruitment failure has been attributed to habitat alteration and competition and predation by exotic fishes on early life stages of razorback sucker. This study was conducted to evaluate two of the potential reproductive bottlenecks that might limit recruitment of razorback sucker in the Green River Drainage; (1) reduced larvae production due to sediment deposition on spawning areas, and (2) reduced survival of larvae or juveniles due to lack of timely access to rood-rich backwater and floodplain habitats.

","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Fort Collins, CO","usgsCitation":"Bowen, Z., Bovee, K., Waddle, T., Modde, T., and Kitcheyan, C., 2001, Habitat measurement and modeling in the Green and Yampa Rivers: Project Report to Natural Resource Preservation Program December 2001, 181 pp.","productDescription":"181 pp.","costCenters":[{"id":291,"text":"Fort Collins Science Center","active":true,"usgs":true}],"links":[{"id":127576,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4ae5e4b07f02db68a5bc","contributors":{"authors":[{"text":"Bowen, Z.H.","contributorId":81045,"corporation":false,"usgs":true,"family":"Bowen","given":"Z.H.","email":"","affiliations":[],"preferred":false,"id":299226,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bovee, K.D.","contributorId":15954,"corporation":false,"usgs":true,"family":"Bovee","given":"K.D.","affiliations":[],"preferred":false,"id":299225,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Waddle, T.J.","contributorId":90240,"corporation":false,"usgs":true,"family":"Waddle","given":"T.J.","email":"","affiliations":[],"preferred":false,"id":299228,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Modde, T.","contributorId":98243,"corporation":false,"usgs":true,"family":"Modde","given":"T.","affiliations":[],"preferred":false,"id":299229,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Kitcheyan, C.","contributorId":84299,"corporation":false,"usgs":true,"family":"Kitcheyan","given":"C.","email":"","affiliations":[],"preferred":false,"id":299227,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ]}